Tropospheric aerosols
A) have residence time of at least several centuries.
B) have the net effect of reducing global temperatures.
C) form a positive feedback loop with increasing atmospheric carbon dioxide.
D) are rarely anthropogenic in origin.
Answer: B
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Which of the following factors can be said to favor urban sprawl?
a. cheap gasoline b. affordable land and increased prosperity c. increased prosperity, affordable land and cheap gasoline d. poor urban planning e. cheap gasoline, affordable land, increased prosperity and poor urban planning
Sylvia Earle is leading a campaign called Mission Blue to finance research and to ignite public support for a global network of marine protected areas, which she dubs ____.
A. oceanic protected areas (OPAs) B. hotspots C. hope spots D. underwater wilderness E. megareserves
Which of the following are located along the midocean ridges?
A) volcanoes B) outcrops of granite C) old oceanic sediments D) evaporite deposits
Which of these features is a depositional glacial landform?
a. cirque b. arête c. esker d. col e. horn